Grinding and polishing machine



(No Model.)

A A E. R. WARE.

GRINDING AND POLISHING MACHINE.

No. 289,323: Patented Nov. 27, 1883.

WITNESSES: INVBNTOR offifwfwf e MEM e ATTORNEYS N, Pzrsss mwunmmpm.wnhmgm n, c.

` EDMUND R. WARE, OF WORCESTER, MASSACHUSETTS.

GRINDINGAND POLISHING MACHINE.

SPECIFICATION forming part of Letters Patent No. 289,323, dated November27, 1883, Application led March 21, 1883. (No model.)

T0 all whom t may concern Be it known that I, EDMUND R. WARE, .a

citizen of the United States, residing at Wor cester, in the county ofWorcester and State of Massachusetts, have invented 4certain new anduseful Improvements in Grinding and Pol ishing-Machines, of `which thefollowing is a specification, reference being had therein to theaccompanying drawings.

Figure l is a perspective view of a machine embodying my invention. Fig.2 is a top or plan View of the chuck employed for holding and presentingthe article to be ground or polished, together with the ways upon whichthe chuck moves. Fig. 3 is an elevation, partly in section, taken online x zr, Fig. 2.

Referring to the drawings, A A represents the frame -work, whichsupports the operative parts of the machine, and B is a bedplateprovided in Fig. l with a lateral extension, B', the extension havingupon its upper face ways or grooves adapted to be traversed by thebaseplate of the chuck, to be hereinafter described.

C C are vertical posts arranged uponthe opposite sides of the machine,and about midway between the corner lugs or posts of the frame.

D D E E e constitute a frame mounted to slide vertically upon the postsC C when actuated by certain devices, to be hereinafter described. Bypreference, I bolt a rabbeted or flanged rib, D, to each of the oppositeposts C, the ribs being of suitable form in crosssection to" providegrooves between their inner edges and the posts for the reception of thevertical sidebars of the frame.

F is an emeryfwheel shaft mounted in bcar ings a b rl, which projecthorizontally from the sliding frame, the shaft being stepped upon andadjusted by a set-screw, f, in the lower end of the lower bearings, a. i

G is an emeryp-wheel or other suitable polishing or grinding wheelmounted upon and carried by the upper end of shaft F, to which a rapidrotary motion is given by means of a belt connecting a beltepulley, g,on the shait with any suitable motor. The pulley g is splined to shaftF, and hasa downwardly-projecting neck or sleeve, which is seated in theinnerend of abracket or supportingarm, D',

which is attached to one of the posts C. In

practice, I usually prefer to make the bracket v and bearing in twoparts, bolted together, as indicated in the drawings.

lH is a driving-shaft mounted in bearings c c, which project from theposts C, the shaft being driven by a pulley, 71, and belt, not shown.

I is a vertical shaft mounted upon the frame A A in suitable bearings,and carrying a wormwhcel, fi, which is actuated by a worm on thedriving-shaft H, but not shown.

J is. a grooved cam mounted on vertical shaft I, and secured thereto bya set-screw, (see Fig. 4,) or otherwise.

j is a stud projecting from the vertical bar e of the sliding frame, andentering the groove of the cam, the stud by preferencebeing providedwith an anti-friction roller.

By means of the mechanism thus described a rapid rotary motion and alsoa rising-andfalling motion may be imparted to the shaft F and theemery-wheel or othergrinding or polishing wheel mounted thereon, as willbe readilyunderstood from an examination of Figs. l and 4 withoutfurther explanation.

Iwill now proceed to describe various mechanisms which I have inventedfor properly supporting and presenting to the grindingwheel the articleto be ground or polished.

Referring to Figs. l, 2, and 3, B' is an eX- tension or continuation ofthe upper plate, B,

of the main frame, and is provided with grooved or ribbed ways, upon orbetween which slides a base-plate, K.

7c is a drum or short section of acylinder provided upon its lower edgewith an external beveled gear, and arranged to fit closely over acircular boss formed for its reception on the upper face of the slidingbase-plate K, the drum being further secured in its position by acentral stud or pivot, o, (see Fig. 3,) around which, as a center, thedrum vibrates or rotates.

K' is a shaft mounted upon the lower face of the extension B', andcarrying a pinion, k, which meshes with a cogged rack on the under sideof the sliding plate K. y

K2 is a hand-wheel on the outer end of shaft K', by meansof whichthesliding plate can be moved toward or from the grinding-wheel shaft Fat the will of the operator', the rela- IOO tion of parts being suchthat the central pivot, o, travels toward and from said grinding-wheelshaft on a line which is radial to said shaft and to the grinding-wheelG.

O is a shaft mounted in an arm, K, which projects horizontally from thesliding baseplate K, and has a rotary motion imparted to it by a beltpassing around pulley O', and thence to any desired motor, which shouldbe placed, by preference, above the machine, and at such distance as topermit the base-plate and the appliances mounted thereon to move towardand from the grinding-wheel, as may be needed without unduly affectingthe tension of the belt. O2 is va shipping-lever pivoted to the arm K3,and carrying at its short end a fork, which engages with a clutch, o2,whereby the belt-pulley may be connected to the shaft O, or disconnectedtherefrom, as may be required. Shaft O carries at its inner end abevel-pinion, which meshes with the bevel-gear on the lower edge of drum7c, (see Figs. 1 and 3,) whereby a rotary motion may be imparted to saiddrum and to appliances connected therewith, as follows: L is an upperplate, and L a lower plate, the latter being made fast directly to thedrum k. The upper plate is connected with the lower one by a series of,studs or bolts, o o', which serve as pivots for the swinging arms N M,and also by means of an outer series of studs orbolts, a. (See Fig. l.)rlhe two parts N M of the swinging arms are connected together bytongues and grooves, preferably dovetailed, so that the parts M canslide longitudinally upon the parts N, and are secured in their positionafter adjustment by set-screws or other analogous devices. Each armcarries at its outer end a sharp-pointed set-screw, m. The upper plate,L, is provided near its outer edge with four circular slots, ZZ, each ofwhich is concentric with the pivot ol of its respective swinging bar,each bar carrying also an adjusting binding-screw arranged to traversethe circular slot, whereby said arm may be securely fastened at suchangle relative to the pivot o as it may be placed in, its vibration in ahori- Zonta] piane being limited only by reason of its binding-screwengaging with the walls of the plate L at the ends of its slot Z. Theselast-described devices constitute, therefore, a sort of chuck, which isdesigned more especially to receive and support irregular-shapedarticles-such as, for instance, the base-plafes of stoves-which havenarrow downwardlyprojecting flanges around their outer edges; and itwill be readily understood that these swinging extensible arms can bereadily adjusted in such manner as to receive and properly support astove base-plate, even though the same be of very irregular outline; andit will also be seen that when thus supported such stove-plate can beadvanced toward and pressed against the grinding-wheel G upon alinewhich is radial to said wheel and to its supporting-shaft F, thestove-plate meantime having imparted to it a rotary motion, and beingheld in contact with the grinding-wheel by means of the hand-wheel K2and the rack and pinion operated thereby.

My machine may be operated as follows: The article to be ground-say, forinstance, an irregular-shaped base-plate for a stovebeing secured uponthe chuck, a slow rotary motion is imparted to said chuck and plate,both of which are advanced by means of hand-wheel K2, so as to keep theedge of the plate pressed against the rapidly-revolving grinding-wheel.When turning sharp corners, the plate should be withdrawn from contactwith the wheel, to prevent improperly cutting such corners to a greaterangle from the plane of the upper yface of the plate than other portionsof the edge are cut.

What I claim is- 1. In a grinding and polishing machine, the combinationof the following elements, namely: a grinding-wheel, a slidingcarrier-frame, a' carrier rotating about an axis which is parallel withthe axis ofthe grinding-wheel, mechanism mounted on the slidingcarrier-frame for rotating the carrier, and mechanism adapted Vto beoperated by the attendant for advancing the article being ground towardthe grinding-wheel and withdrawing therefrom when turning corners,substantially as set forth.

2. In a grinding and polishing machine, the combination of the followingelements, namely: a grinding-wheel, a sliding carrier-frame, a rotatingcarrier supported wholly fromene side upon a pivot mounted on thesliding carrier-frame and parallel with the shaft of the grinding-wheel,a 'driving-shaft mounted on the sliding carrier-frame at a right angleto the grin ding-wheel shaft, and gearing connecting the driving-shaftwith the rotating carrier, substantially as set forth. A

3. In a grinding and polishing machine, the combination, with thegrinding-wheel and the sliding carrier-frame, of the carrier mounted onthe sliding frame and supported wholly from below, the driving-shaft andgearing for rotating the carrier, the hand-wheel mounted on the outerend of shaft K', the clutch connecting the band-wheel with thedriving-shaft, and the shipping-lever mounted on the sliding frame andextending beneath the plane of the carrier to within reach of theoperator at the hand-wheel, substantially as set forth.

et. In a grinding and polishing machine, the combination of a taperinggrinding-wheel and a carrier wh ose axis of rotation is parallel withthe shaft of the grinding-wheel, and is movable on a line whichintersects the shaft of the grinding-wheel, substantially as set forth.

5. In a grinding and polishing machine, the combination of ataperinggrinding-wheel and a carrier which rotates in a plane at right angles tothe grinding-wheel shaft, and is movable on a line intersect-ing the shaft of the grinding-wheel.

6. In a grinding and polishing machine, the

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combination of pivoted arms and eXtensible arms attac-hed to and movablerelatively to said pivoted arms, substantially as set forth.

7. In a grinding and polishing machine, the combination of a series ofpivoted arms and means for securing said arms in such positions as theymay be adjusted to, substantially as set forth.

8. In a grinding and polishing machine, a series oflongitudinally-eXtensible arms, in combination with movable points ordogs secured to the outer ends of said arms, substantially as set forth.

9.' In a grinding and polishing machine, a mechanism for holding thearticle to be ground, 1 5 consisting of two substantially-parallelplates mounted upon and `adapted to rotate about a central pivot,and aseries of arms pivoted between said plates, substantially as set forth.

In testimony whereof I aiiiX my signature in 2or presence of twoWitnesses.

EDMUND R. WARE.

Witnesses:

H. H. DOUBLEDAY, J. S. BARKER.

